S
M
T
W
T
F
S
30
91°
74°
31
90°
76°
1
91°
76°
2
91°
75°
3
90°
75°
4
90°
74°
5
91°
74°
6
90°
73°
7
88°
72°
8
90°
73°
9
89°
72°
10
90°
71°
11
89°
72°
12
90°
71°
13
90°
72°
14
89°
70°
15
86°
71°
16
88°
71°
17
90°
70°
18
85°
69°
19
85°
70°
20
86°
70°
21
88°
69°
22
85°
69°
23
86°
68°
24
86°
69°
25
84°
68°
26
83°
68°
27
83°
67°
28
84°
67°
29
85°
66°
30
84°
67°
1
82°
66°
2
83°
65°
3
81°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Freeport
Freeport's September 2026 forecast shows daily high temperatures ranging from 81° to 91°, with overnight lows between 65° and 76°. The average high for September is 87° with an average low of 70°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Freeport. See also: October | November | December.
